What's trending in the NFL: Mallett's missed opportunity; Pierre-Paul returns

Here's a look at the top stories in the NFL on Tuesday:

Top stories

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From ESPN Stats & Information: When the Packers and Broncos square off on Sunday, it'll mark just the fourth matchup of 6-0 teams in NFL history -- and the first since 2007 when the Patriots beat Peyton Manning and the Colts. In the previous two instances, the team that won the game went on to lose the Super Bowl.

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